This was indeed an integral and important, though strictly subordinate, part of the comprehensive plan adopted by the lieutenant-general for the spring campaign. Besides distracting the attention of the Confederates, and either drawing off a large part of their forces from Sherman's front or else causing them to give up Mobile without a struggle, the control of the Alabama River would give Sherman a secure base of supplies and a safe line of retreat in any contingency, while the occupation of a line from Atlanta to Mobile would, as Grant remarked, "once more split the Confederacy in twain." But while in Louisiana the troops stood still, awaiting the full completion of Canby's exhaustive preparations, elsewhere events were marching with great rapidity. On the 3d of June Grant's campaign from the Rappahannock to the James came to an end in the bloody repulse of Cold Harbor, with the loss of 12,737 officers and men. On the 14th he crossed the James and sat down before Petersburg. In the six weeks that had passed since the Army of the Potomac made its way into the Wilderness, Grant had lost from the ranks of the two armies of the Potomac and the James nearly as many men as Lee had in the Army of Northern Virginia.(3) While he was himself directing the movement of Meade and Butler against Richmond and Petersburg, Grant ordered Hunter, who commanded in the Shenandoah Valley, to march by Charlottesville on Lynchburg, and sent Sheridan, with the cavalry on a great raid to Charlottesville to meet Hunter; but Lee sent Early to intercept the movement, and Early, moving with the speed and promptness to which Jackson's old corps was well used, got to Lynchburg in time to head Hunter off. Then Hunter, rightly deeming his position precarious, instead of retreating down the valley, made his escape across the mountains into West Virginia. This left the gates of the great valley thoroughfare wide open for Early, who, instantly marching north, once more invaded Maryland, harried Pennsylvania, and menaced Washington.